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SAT® Math

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Moderate

A Function with an Unknown Constant

SATMAT-FIA4RY

If $ f(x)=-2{ x }^{ 2 }+4a $ and $ f(-3)=4 $, then what is the value of $ a $? (Calculator)

A

$ 5.5 $

B

$ 10 $

C

$ 3.5 $

D

$ -8 $